The input and output signal voltages for a common-emitter amplifier are
A) always 180° out of phase.
B) 180° out of phase in all but one amplifier configuration.
C) in phase in all but one amplifier configuration.
D) always in phase.

Question

Quizplus · Accepted Answer

In a common-emitter amplifier configuration, the output signal is inverted compared to the input signal, resulting in a phase shift of 180° between the input and output.

The Input and Output Signal Voltages for a Common-Emitter Amplifier